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Finding the Fourth Proportional to 679.92, 937.89 and 417.66

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Solution

The fourth proportional to 679.92, 937.89 and 417.66 is: 576.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.92 : 937.89 = 417.66 : x
  2. Step 2: Convert to fraction form
    679.92/937.89 = 417.66/x
  3. Step 3: Cross multiply
    679.92x = 937.89 × 417.66
  4. Step 4: Simplify right side
    679.92x = 391,719.14
  5. Step 5: Solve for x
    x = 391,719.14/679.92
  6. Step 6: Final answer
    x = 576.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.